83 lines
2.2 KiB
Python
83 lines
2.2 KiB
Python
import numpy as np
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import torch
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import matplotlib.pyplot as plt
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import skimage
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from scipy.stats import skew
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filename: str = "example_data_crop"
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use_svd: bool = True
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torch_device: torch.device = torch.device(
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"cuda:0" if torch.cuda.is_available() else "cpu"
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)
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print("Load data")
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input = np.load(filename + str("_decorrelated.npy"))
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data = torch.tensor(input, device=torch_device)
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del input
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print("loading done")
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stored_contours = np.load("cells.npy", allow_pickle=True)
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if use_svd:
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data_flat = torch.flatten(
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data.nan_to_num(nan=0.0).movedim(0, -1),
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start_dim=0,
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end_dim=1,
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)
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to_plot = torch.zeros(
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(int(data.shape[0]), int(stored_contours.shape[0])),
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device=torch_device,
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dtype=torch.float32,
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)
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for id in range(0, stored_contours.shape[0]):
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mask = torch.tensor(
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skimage.draw.polygon2mask(
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(int(data.shape[1]), int(data.shape[2])), stored_contours[id]
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),
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device=torch_device,
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dtype=torch.float32,
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)
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if use_svd:
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mask_flat = torch.flatten(
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mask.unsqueeze(0).nan_to_num(nan=0.0).movedim(0, -1),
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start_dim=0,
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end_dim=1,
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)
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idx = torch.where(mask_flat > 0)[0]
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temp = data_flat[idx, :].clone()
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whiten_mean = torch.mean(temp, dim=-1)
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temp -= whiten_mean.unsqueeze(-1)
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svd_u, svd_s, _ = torch.svd_lowrank(temp, q=6)
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whiten_k = (
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torch.sign(svd_u[0, :]).unsqueeze(0) * svd_u / (svd_s.unsqueeze(0) + 1e-20)
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)[:, 0]
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temp = temp * whiten_k.unsqueeze(-1)
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data_svd = temp.movedim(-1, 0).sum(dim=-1)
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to_plot[:, id] = data_svd
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else:
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ts = (data * mask.unsqueeze(0)).nan_to_num(nan=0.0).sum(
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dim=(-2, -1)
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) / mask.sum()
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to_plot[:, id] = ts
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skew_value = skew(to_plot.cpu().numpy(), axis=0)
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skew_idx = np.flip(skew_value.argsort())
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skew_value = skew_value[skew_idx]
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to_plot_np = to_plot.cpu().numpy()
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to_plot_np = to_plot_np[:, skew_idx]
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plt.plot(to_plot[:, 0:5].cpu())
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plt.show()
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block_size: int = 8
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# print(to_plot.shape[1] // block_size)
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for i in range(0, 4 * 8):
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plt.subplot(8, 4, i + 1)
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plt.plot(to_plot[:, i * block_size : (i + 1) * block_size].cpu())
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plt.show()
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